Pump-driving mechanism.



E. B. FETZER.

PUMP DRIVING MECHANISM.

APPLICATIAON FILE D MAY 6. 1916.

1 ,21 9,093. Patented Mar. 13, 1917.

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ELIAS BICKEL rn'rznrtor MILTON, PENNSYLVANIA, A

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PUMP-DRIVING MnonANIsM.

Specification of Letters Patent.

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Application filed May 6, 1916. Serial No. 95,879, v

To alt whom it may concern:

Be it known that I, ELIAS B. FE'rzER, a citizen of the United States, residing at Milton, in the county of Northumberland and State of Pennsylvania, have invented a new and useful Pump-Driving Mechanism, of which the following is a specification.

This invention has reference to pump driving mechanism, and its object is to pro-v vide means for reciprocating a pump rod wherein the driving power is so applied as to produce rotary motion.

The invention is an improvement upon the pump operating attachment shown and described in Letters Patent No. 619,824, granted to me February 21, 1899, and comprises a cam and slot driving device capable of being operated by hand or power in such a manner that the rotation of the cam within the slot causes the reciprocation of a rock member in which the cam is produced, said rock member being pivotally mounted at one end and at the other end connected to the pump rod.

In the aforesaid patent the rock member or lever in which the cam moves has the longitudinal axis of the cam, the pivot point of mounting of the lever, and the point of connection to the pump rod all in one line. This necessitates a considerable elevation of the operating shaft carrying the cam and consequently where the pump is operated by hand, as by a crank on the operating shaft, such crank is so high above the floor or ground level from which the pump standard rises as to be awkward of operation.

In accordance with the present invention the cam slot is offset from the line of pivot of the lever and its connection with the pump rod, wherefore the cam shaft may be located considerably lower than in the arrangement shown in the aforesaid patent, and consequently without increase of parts or complication of mechanism the operating crank shaft may be located at a much more convenient level than before. Furthermore, the structure of the present invention permits a better distribution of connection to The invention will be best understood from a consideration of the following detailed description, taken in connection with the accompanying drawings forming part of this specification, with the further un derstanding that while the drawings show a practical form of the invention, the latter is not confined to any strict conformity with the showing of the drawings, but may be changed and modified, so long as such changes and modifications come within the scope of the appended claims.

In the drawings Figure l is an elevation of a pump standard of known commercial form with the pump rod operating mechanism applied.

Fig. 2 is a longitudinal section of the operating mechanism removed from the PLUDP and omitting the driving member.

Fig. 3 is a section on the line 33 of Fig. l but drawn on a larger scale.

Referring to the drawings there is shown a pump standard 1 of known construction and which may be taken as indicative of any suitable pump standard. This pump standardis shown as provided with an air bell 2 and a polish rod 3, but, of course, other constructions of pump standard may be employed. Secured to the pump standard and in the particular showing of the drawings by clamp members i at opposite ends of the bell 2, is a triangular frame 5 made up of two parts which may be practically identical and suitably spaced apart, though connected together by the clamps 4:, and wherever else deemed necessary. Each frame 5 is of acute triangular form with arms 6, 7 respectively, meeting at an acute angle, as indicated at 8, while the third member of the triangle indicated at 9 may, in the particular instance shown, be curved to accommodate the bell 2. The arrangement is such that when the frames 5 are attached to the pump the arm 7 rises away from the pump from the upper endv of the bell and is supported at the outer end 8 by the arm 6. Considering the clamp 4 as applied to the upper end of the bell at a point close to the emergence of the polish rod 3 therefrom, the outer angle end of the frames 5 is higher than the top of the bell. Pivoted at the angle ends 8 of the frames 5 by a pivot pin or bolt 10 is a lever 11 having an arm 12 of a length from the pivot 10 to reach to the polishrod 3 to which it is connected by a link 13, so that on the rocking of the lever 11 the polish or pump rod 3 is caused to reciprocate.

Formed on the lever 11 to one side of the arm 12 and at an angle thereto, which angle may be an acute angle, is a frame 14: defining and inclosing a slot 15 in which there is lodged a cam 16 mounted on a shaft 17 having journal bearings 18 on the arms 6. The shaft 17 carries a driving balance wheel 19 which in the case of the pump being driven by hand power may be supplied with a manipulating handle 20. Of course, power may be applied to the shaft 17, but the invention is particularly applicable to hand driven pumps, because of the low level of the driving shaft 17 with respect to theavailable end of the pump rod represented by the polish rod 3.

In the installed position of the parts the frame 1i is lower than the pump rod operating arm 12, and has a downward inclination toward the pump. The leverage between the cam 16 and the frame 1d is sufficient to permit the easy running of the operating mechanism for the pump rod, and this leverage may be increased to any extent desired by the location of the handle 20, which, whether attached to a wheel such as 19 or to an ordinary crank, operates in the same manner as a crank. llhe wheel 19, however, is advantageous in serving as a balance wheel, thus contributing to the steadiness of movement and to an extent counteracting the effect of the variation in load, especially with a single-acting pump.

Even in the case of the employment of power to drive the pump and the application of a belt to the wheel 19, or to a pulley carried by the shaft 17 both being customary modes of applying power, the lower position of the shaft 17 in comparisonwith the position of the drive shaft in theaforesaid Letters Patent is advantageous in requiring less belting.

hat is claimed is An operating mechanism for reciprocating pumps, comprising two substantially triangular-Shaped frame members in spaced registering relation, clamping means provided at the upper and lower angles of the frame members for fastening said members to a pump in offset relation thereto with the apexes of the members extending above the upper fastening means, a rock lever arranged between the frame members and pivoted at one end to the apeXes thereof and at the other end connected to the pumprod, said rock lever working between the frame members and having a slot frame below 'the plane of the pivot and pump rod connections, and a cam shaft carried by the frames below the top thereof and provided with a cam to work in the slot frame. In testimony that I claim the foregoing as my own, I have hereto aflixed my signature in the presence of two witnesses.

ELIAS BICKEL FETZER.

Witnesses WM. P. WVENDLE, W. M. BOWER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

